1. American Psychiatric Association (1994). Diagnostic and Statistical Manual of Mental Disorders (4th edition). Washington, DC: American Psychiatric Association. （American Psychiatric Association （編）高橋三郎・大野裕・染矢俊幸（訳）（1996）．DSM-IV精神疾患の診断・統計マニュアル 医学書院）
2. Arnett, J. J. (2014). Emerging Adulthood: The Winding Road from the Late Teens Through the Twenties. Oxford University Press.
3. Berman, S. L., & Montgomery, M. J. (2014). Problematic identity processes: The role of identity distress. Identity, 14, 241–245.
4. Côté, J. E., & Levine, C. G. (2015). Identity Formation, Youth, and Development: A Simplified Approach. Psychology Press.
5. DaSilveira, A., DeSouza, M. L., & Gomes, W. B. (2015). Self-consciousness concept and assessment in self-report measures. Frontiers in Psychology, 6, 930.